Timer



Patented Oct. 2', 1928.

. 13. um. ua w This invention relates to timers. In general this inveutionfis "an improveinent over that disclosed in ray-prior Patent No. 1,532,751, a: A ra 7, mama has the same general objects of such invention.

This invention has for its further the provisionofa novel form of timer which may be applied to the standardtimer shaft a the eonta'ct'of t e rolleijeo that the maximum curmnt flo'w is instantly established for sachet circuits of the ignitionsystem. e v

Further objects ate to provide a timer which is of very simple andstrong construction, and which may be readily manufacthe construction is' such that the contacts aperture 24 in the timer shaft 25.

tured at a small cost.

Further objects are to providea .timerin which the contacts may be very cheaply renewed if they become worn, and in which may be replaced with aminimum of effort.

An embodiment of the invention is'fshown in the accompanying drawings in which Figure 1 is a view of the timer with parts I broken away showing the 'parts'in their assembled position; I Figure 2 is a sectional view on the line 2-2, Figure 1.

The timer comprises an insulating casing 1 which constitutes the timer. cap. It is provided with. a recessed central ortion 2, adapted to receive the usual attac ing clip. Further, this casing is provided with an ina ner annular flange 3 to fit the'standard construction of the internal combustion engine. The casin carries a plurality of regularly spaced stu s or bolts 4 which have inner and enlar ed heads '5, and which are clamped tight y in place by means of a nut 6; such bolts projecting beyond the nuts to receive the wire terminals and thumb nuts. Between the heads 5 and the adjacent fiat portions 7 of'the interior of the casing, arms 8 of metal, are positioned and are clamped tightly in place by means of the heads 5, as most clearly shown inFigurexl. These arms are provided with a pair of inwardly turned ,ziod thereby."

ears '9, which are received th cars 10 of EPIVMIAHYJIMM am 11. This am I wixaurimn, or mwam y 1- is urged outwardly means of the i 'ng 12,1101! spring surrounding the split pm or pantie pin 13, which joins-the c rs 9 and 10. "I110; vtree and of: fliepivotally (1 arms 11am rovided with; contact blocks 14, and thesemetal contact between a pair of projecting parallel-cars 16, m nmstctearly shown in Figure 2.

i. Thc mller comprises an insulating body blocks are held by means of a riveted po tion The contact blocks are positioned portion ordisc 17 provided with a hub and with a mi bushing 18. This metal bush;-

ing has an outwardly extending flange .19

whichjeinsthecontaet mgments 20, such be being of metal, as desired. a The Y rollermay be molded th contacts car- I The inner bushin (if the relief is pr videdwith a key-way or recessed portion 21.

This keyway is adapted to receive the elongated head 22 of a T-shaped pin. This pin is provided with an inwardly projecting portion 23, which, as may be seen from Figure 3, isadapted for positioning within the usual It is to be noted that the roller-is held against displacement from the casing by means of the overhanging inwardly projecting ears 16 of the pivoted arms 11.v Thus the entire device, that is to say, the casing andthe roller, is handled and positioned as a unit. It also may be removed as a unit from the shaft whenever desired.

In installing the device itis merely necessary to position the pin or key so that its head 22 parallels the axis of the shaft. Thereafter, the :entire unit is slipped into place, the roller beingcarried by the arms 11 and being held between the ears 16. This roller freely floats upon the shaft, and thus accurately accommodates itself to the stationarycontact carried by the pivoted levers 11, so that no binding or excessive friction can occur.

Further, it is impossible for the two parts of this apparatus to be misplaced, as the roller and casing are at all times held together as a unit by the inherent characteristics of the constructionsof this timer.

It is also to be particularly vnotedthat an extensive surface contact between the stai be readily replaced by removing the timer and loosening the corresponding bolt 4.

It is to be noted further that the rotary portion of this timer is symmetrical and, consequently, there is no unbalanced condition which would, when acted upon by centrifugal force, cause disturbances. Instead the rotary portion is merely a circular disc with a metal segment, and the heavy or relatively large contact blocks are the stationary contacts.

It is to be noted particularly that the contact blocks are carried by the pivotal arms in such a manner that they will accurately adjust themselves to the periphery of the roller, although the roller may be mounted on a shaft which is not exactly concentric with reference to the casing. For example, when the timer is placed upon a well worn shaft this condition may easily a result.

However, no harm is done, as the device is self-adpisting. v

-- Although the lnventlon has been described in considerable detail, such description is in- ..tended as illustrative rather than limiting as the invention may be variously embodied and as the scope of such invention is to be determined as claimed.

ing a segmental contact, a casing surrounding said roller, and having a plurality of terminal receiving members, stationary arms carried by each of said members, pivotally mounted arms carried by said stationary arms, springs urging said pivotally mounted arms inwardly, and a plurality of contacts carried by said pivotally mounted arms and adapted to engage the periphery of the rollc'r, each of said contacts having front and rear ears adapted to overhang the front and rear faces of the roller.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee, and State of Wisconsin.

ADAM W. KAUFMAN. 

